Rep. Bill Cassidy, R-La. (right), poses with his family and House Speaker John Boehner at the start of the new Congress, on Jan. 3. On Wednesday, Cassidy announced that he would challenge Democratic Sen. Mary Landrieu in 2014. Cliff Owen/AP hide caption

itoggle caption Cliff Owen/AP

Rick Santorum told voters in Mandeville, La. on Wednesday that they were "not looking for someone who's the Etch A Sketch candidate." Sean Gardner /Reuters /Landov hide caption

itoggle caption Sean Gardner /Reuters /Landov

Men fish off a pier at a jetty in Dauphin Island, Ala., with oil rigs in the background. The U.S. government is changing how it regulates drilling platforms.

Mario Tama/Getty Images hide caption

itoggle caption Mario Tama/Getty Images